Completely assembled, and feature bulletproof crankcases, flywheels, cylinders and heads, and finish the engine with their new premium valve train components. S&S billet gear cover, tappet guides, and rocker boxes look outstanding, and offer the kind of performance you have come to expect from S&S. The new tappet guides are designed around the quiet and dependable tappets installed in Evolution Big Twin engines. Corrected tappet guide bore geometry assures proper valve timing using cams styled after those found in Evolution engines. The unique adjustable pushrods are collapsible for easy removal and installation, but are stronger than their older counterparts. Inside the billet rocker covers are S&S s straight rocker shafts and the new S&S forged roller rocker arms (also available separately). The result is Shovelhead engines with the kind of quiet power that some folks may just have a hard time believing, and they are covered by a two year warranty! A new addition is the 93" Alternator/Generator engine. This is the perfect engine for that Retro build, but with a modern alternator charging system. In addition, its late-style sprocket shaft permits the use of 5 and 6 speed transmissions for additional functionality. CC#601740 is an Alternator Shovelhead engine with 8.2:1 compression cast pistons, 3-5/8" bore, 4-1/2" stroke, an S&S 585 cam, billet gear cover, updated cam and tappets, and a new Super Stock ignition system. CC#601741 is an Alternator/Generator Shovelhead engine with 8.5:1 compression cast pistons, 3-5/8" bore, 4-1/2" stroke, an S&S 585 cam, cast gear cover, updated cam and tappets, a new Super Stock ignition system and stock rotation cam drive gears. It requires use of a stock or custom 1966 thru 1969 exhaust system.